Pump



Patented May 12, 1931 4UNI'I'l-:D STATES PATENT OFFICE ALFRED J. GILBERT, or' WINDSOR., CONNECTICUT, AssIeNOR To THE SILENT GLOW on. BURNER CORPORATION, or HARTFORD, CONNECTICUT, A CORPORATION or' CON- NEGTICUT PUNT Application led August 4, 1927. Serial No. 210,479.

My invention .relates to the class of devices employed more especially for effecting a iow `of fluids, and an object of my invention, among others, is the production of a device 5 of this class that shall 'be simple in construc- A tion and particularly eicient in operation, and particularly'one in which a high vacuum may be lproduced without reduction of the discharge capacity. 4

One form of device embodying my invention and in the construction and use of which the objects herein set out, aswell as others, may be attained, is illustrated in the accompanying drawings, in which- Figure l is a side view ofmy improved pump with .partsbro'ken away to show con-V for conducting fluid operated upon .by said y pum i Y ,Tlie chamber 4 is preferablyround in cross s0 section and'a piston 7 also round is mounted upon a shaft 8 extending in and eccentric to the chamber 4 and .havingI a bearing in a hub 9 preferably formedintegral with a cap 10 secured in any suitable manner to the' case 3 to close one'side "of the chamber 4 therein. lA cap 11 is secured to the opposite side ofthe c ase to close'the opposite side of said chamber.

Vanes 12 are slidably mounted'in the piston 7 to project across the chamber 4, these vanes beingyrmoved outwardly by centrifugal force and inwardly by contact with the wall of said chamber. These vanes provide chambers constituting means for segregating fluid and conductlng it in this condition from one part of the cylinder' to another part thereof. The piston 7 passes closel enough to the wall of the chamber 4 on` one side to form a practical seal at this point and '66 there maybeany ldesired numberv o' vanes 12. The inlet port *p5 is preferably smaller:`

than the outlet port 6 and said ports are lo-4 catedin proximity to the sealing point, as

shown in Figune 2.

As hereinb'efore stated this pump is capable of producing a highvacuum without reducing the discharge capacity. If the inlet be restricted sufficiently to produce a high vacuum this would lessen the` amount of air J passing through the pump. In order to Oifset this result a relief port 13 is'extended into the cham-ber 4 from the outer atmosphere and this is located at a sufficient distance from the inlet 5 so that at least two vanes will be in contact withthe inner wall of the cylinder between 'the ports 5 and 13. As .the piston` is rotated the space created jbetween these 'two ports by the vanes `in that region produces a high vacuum at the inlet port 5, if a suitable restriction is. placed in thatv inlet, 'as by reducing its size or otherwise. A valve 14 is placed in the port 1,3 by means of which the amount of air entering through this port may be regulated to any desired amount, and

in this way the amount of discharge of the pump through the outlet port 6 ma be regulated tosuit any condition desired The operation and advantages of a pump constructed in accordance with my invention will be seen from an explanation of aparticular purpose for which the embodiment of my inventionfshown in the drawings was designed and to which it is put. That purpose is supplying oil and air for oil burners. The' port, 5, is connected with an oil supply and the port,l 13, as has been explained opens to the atmosphere and through it'air is supplied.` Thus, both oil and air are drawn into the pump and passing through the cylinder are. thoroughlymixed so that the fuel mixture. passes out of the outlet, 6. The desired high vacuum is producedto cause the flow of oil into `the cylinder throughthe inlet port, 5, by the vmovement of the vanesbetween port 5, and port, '13, which Yanes are so alsl relatively spaced that at rio-time can there v be direct communication between'port, 5, and

13V into the cylinder cannot reduce or affect thehigh vacuum thus produced. Therexs a port, 13, and 4henceair flowing through port,

reduction of intensity of the suction or vacnum only when the space-between two adjacent vanes is in communication with the air inlet 13. The result is that while'the pump roduces the high v'vacuum for sucking oill into the cylinder that is accomplished without any reduction of the discharge capacity of the pump andthe pump works to full ca.-

pacity upon the mixed oilh and air. That portion, of the cylinder into which the air iiows through port, 13, has greater capacity or volume than that through which the varies pass in producing the high vacuum. It will be evident that the port, 13, supplies the air which adds to the volume of fluid passing through the pump that enables the ump to 1 act to its full capacity notwithstan ing the reduction of-,volume flowing through the port, 5, necessary to give the high vacuum.

` accommodate two o ume, a piston rotatably mounted in sa In accordance with the provisions of the patent statutes I have described the .principles of operation of my invention, together with the device which I nowconsider to represent the best embodiment thereof; but I desire to have it understood that the Mdevice shown is only illustrative and that the invention may be carried out by other means and applied tp uses other than those above set out.

Vmounted in said iston, a pair of independent ports for iow o different fluids from different sources in ,thesame direction with respect to the chamber in the case, such orts leading toportions of the chamber o small and large volume, respectively, .the distance between 1said pair of ports being vsuiiicient to said vanes, and means for rotating said piston.

3. A pum comprising a case chamber wit parts of small and large volvanes slidably mounted in said piston, a pair of independent inlet ports for supply lof different fluids from different sources to the chamber within the case and the inlet ports leading respectively to the parts of small and lar e volume of the case, an outlet port from sai chamber, said varies being located so that the'space between the inlet ports will accomf modate at least two of said vanes, and meansr for rotating. said piston.x

4. A pump comprising ,a vcase hiiving a chamber with parts of small andlarge vol having a' d case, i

urne having a pair of inlet ports for supply of different iiuidsfrom different sources an an outlet port, the inlet p'rts beingeachsmaller than the voutlet port, a piston rotatably mounted inthe case and the inlet ports lea ing respectively to the parts of small and large volume of the case, varies slidably -mounted in said piston and located such a distance apart tliatat least two will be located between said inlet ports,.and means for rotating said piston. .i A

5. A pump comprising a. case, a piston lo cated in said case, vanes slidablymounted in said piston, a plurality of independent ports for flow of different fluids from' dierent Lsburces in the same direction with respect to the chamber in the case, such ports leading to portions of the chamber of small and large volume, respectively, a valve located in lone of said ports, and means for rotating said piston.

,6. A. pump having rotary iluid iinpelling l means, a chamber' in which such meansfrpr tate, a plurality of spaced apart fluid inlets leading into such-ch/amber at different points in the travel of the impelling means therein, and a single 'outlet from said-chamber the chamber having a portion of less volume between the inlet ports than beyond them, the impelling means comprising pistons that reach to the interior wall of 'the chamber3 and which are spaced `apart a less distance than the distance between the inlet ports.'

7. A pump comprising a case, a piston rotatably mounted in the case to create a chamber of varying capacity inJ different parts thereof, said case'liaving inlet ports opening to Vdiierent parts of `said chamber, varies mounted in the piston 'and movable radially thereof, the-distance between the varies being lessthan (the interval between said port-s, and means for rotating said piston.

18. A pump comprising a case having a chamber round in one plane, a piston round 'in cross section but smaller in diameter than the diameter of ksaid chamber, said piston beingjmounted to touch one side of the chamber, said chamber having inlet ports openingf thereinto at diierent points, .vanes mounted in saidfpiston and movable radially thereof', the Adistance between the varies being lem than the intervaly between said inlet orts, thereby'creating a Achamber movable .romone port to the other with 'constantly increasing capacity, vand means' for rotating the piston. A

ALFRED J. GILBERT. 

